Glass stem



FIG. 1 is a top front perspective view of a glass stem showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a back elevation view thereof;

FIG. 6 is a side elevation view thereof; and,

FIG. 7 is an opposite side view thereof.

The glass stem is the stem and base of a glass. 

The ornamental design for a glass stem, as shown and described. 